These paper bags are designed to fit ELECTROLUX vacuum cleaners: Janitor Semi-professional Z 1516, Z 716, Z 720. ELECTROLUX high quality paper bags have been created to fit your vacuum cleaner and maintain its best performance. The high grade of material used for these paper bags provides your vacuum cleaner with high airflow and strong suction power as well as a high filtration level and maximum dust retention. For optimum performance, we recommend to change the paper bags regularly. The use of non genuine vacuum bags may adversely affect your central vac. This pack contains 5 paper bags. ELECTROLUX paper bags reference: E 72B.